do not check YAML if nothing was parsed

Signed-off-by: Christophe VILA <christophe.vila@thalesgroup.com>
(cherry picked from commit f736af95eb)

pkg/lint/rules/template.go

@@ -122,6 +122,9 @@ func Templates(linter *support.Linter, values map[string]interface{}, namespace
 			// key will be raised as well
 			err := yaml.Unmarshal([]byte(renderedContent), &yamlStruct)
 
+			if (K8sYamlStruct{}) == yamlStruct {
+				continue
+			}
 			// If YAML linting fails, we sill progress. So we don't capture the returned state
 			// on this linter run.
 			linter.RunLinterRule(support.ErrorSev, fpath, validateYamlContent(err))